Using == when comparing objects

Recently in a job interview I was asked this following question (for Java): Given: String s1 = "abc"; String s2 = "abc"; What is the return value of (s1 == s2) I answered with it would return false because they are two different objects and == is a memory address comparison rather than a value comparison, and that one would need to use .equals() to compare String objects. I was however told that although the .equals(0 methodology was right, the statement nonetheless returns true. I was wondering if someone could explain this to me as to why it is true but why we are still taught in school to use equals()?

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